Add Dockerfile (#246)

* Add Dockerfile

* add KLAUS_VERSION build arg

Dockerfile

@@ -0,0 +1,16 @@
+FROM alpine:edge
+
+RUN echo http://dl-cdn.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories && \
+    apk add --no-cache uwsgi-python git ctags  py3-six py3-markupsafe py3-pygments \
+                       py3-dulwich py3-humanize py3-flask py3-flask-markdown
+
+RUN apk add --no-cache python3-dev gcc musl-dev && \
+    pip3 install python-ctags3 && \
+    apk del python3-dev gcc musl-dev
+
+ARG KLAUS_VERSION
+RUN pip3 install klaus${KLAUS_VERSION:+==}${KLAUS_VERSION}
+
+EXPOSE 5000
+ENTRYPOINT ["uwsgi", "--plugin", "python", "--http11-socket", "0.0.0.0:5000"]
+CMD ["-w", "klaus.contrib.wsgi_autoreload"]